Is there some particular reason why two shareable nodes cannot exist under same parent?

[mkuzela]

Hello

I would like to have 2 shared nodes under same parent like:

/parent/node1

/parent/node2

where node2 is shareable copy of node1.

But when I try to do it with:

workspace.clone(workspace.getName(), "/parent/node1", "/parent/node2", false);

I receive:

javax.jcr.UnsupportedRepositoryOperationException: Unable to share '/parent/node2' at '/parent/node1' since it has already been shared at '/{}parent'

  at org.modeshape.jcr.JcrWorkspace.internalClone(JcrWorkspace.java:408)

  at org.modeshape.jcr.JcrWorkspace.clone(JcrWorkspace.java:306)

and I see code checking for it in org.modeshape.jcr.JcrWorkspace class like:

                if (destParent.isSameAs(srcPath.getParent())) {

                    String msg = JcrI18n.unableToShareNodeWithinSameParent.text(srcAbsPath, destAbsPath, destParent);

                    throw new UnsupportedRepositoryOperationException(msg);

                }

My question is, is this only Modeshape (3.6.0) restriction or there is some JCR specificatin restriction?

thanks

Martin

[rhauch]

I'm not sure whether it is a requirement of JCR 2.0 (I thought it was, but cannot find it in the spec), but in the very least when we implemented shareable nodes we chose to implement this limitation because it didn't seem useful to share one node multiple times under the same parent.

[mkuzela]

Hi Randall

Actually it would be somewhat helpful for my project (I am creating shareable copy of existing node to indicate new XML tree is being edited, and in the beginning it is exact copy of previous node) but I can do a workaround of course.

But, maybe it would be interesting to compare it with other JCR implementations, as it can cause some incompatibility.

Maybe I will test this with  JackRabbit in some spare time.

Martin